Java中HashMap遍历几种方式[通俗易懂]

　　Map map = new HashMap();
　　Iterator iter = map.entrySet().iterator();
　　while (iter.hasNext()) {
　　Map.Entry entry = (Map.Entry) iter.next();
　　Object key = entry.getKey();
　　Object val = entry.getValue();
　　}

　　Map map = new HashMap();
　　Iterator iter = map.keySet().iterator();
　　while (iter.hasNext()) {
　　Object key = iter.next();
　　Object val = map.get(key);
　　}

Map<String, String> map = new HashMap<String, String>();
for (String key : map.keySet()) {
	map.get(key);
}

Map<String, String> map = new HashMap<String, String>();
for (Entry<String, String> entry : map.entrySet()) {
	entry.getKey();
	entry.getValue();
}